The Spokane Transit Authority is warning bus riders that some routes may be late on Tuesday as a result of slippery roads.

An inch of snow was measured at the National Weather Service’s Spokane office on the West Plains at about 6 a.m., said meteorologist Amanda Young. The weather service received reports of 2 inches in Ritzville and 2 1/2 inches near Rockford.

The weather has not affected the schedules of Spokane County or Kootenai County school districts. A few districts west and south of Spokane, including Tekoa and Lind-Ritzville, announced two-hour delays. A full list of delays is available here.